The 49th Annual Symposium will be hosted by the Coastal Empire Chapter at the DeSoto Hotel in Savannah, Georgia from 8-12 October 2018.
The theme this year is "Tomorrow's Flight Test".
Please view this...
I am in process of applying for FAR 25 certification for a twin engine turbo prop transport aircraft. As per FAR 25.121 the aircraft need to demonstrate a steady climb gradient of 2.4%. However as per FAR 25.111 & 25.113, 25.115, the net climb gradient is the gross gradient reduced by 0.8% . Therefore I wish to know whether the aircraft is required to demonstrate 1.6 % (2.4%- 0.8% = 1.6%) of second segment climb gradient or 3.2 % (3.2% - 0.8% = 2.4%) of second segment climb gradient ?
I was going through a flight manual of HS 748 (AVRO aircraft).
There were two graphs for second segment climb gradient :-
1 The WAT graph was giving an AUW for a particular Altitude and Temperature condition and
2 the Net takeoff flight path graph of second segment was giving various gradients for various weight, altitude and temperature conditions.
The AUW of WAT graph for a particular condition was giving only 1.6% gradient in the Second segment net takeoff flight path graph.
This puts a doubt in my mind as to WAT graph in the flight manual is supposed to give 2.4% gross or net performance.
Can you please elaborate on the subject with some documentary references.
I doubt somewhat that the HS748 is a FAR-25 aeroplane. Check the TCDS for the approval basis, which I suspect will be the old BCAR Section D.
I'm on holiday and just using my phone at the moment, but if you need it and contact me direct next week, I have scans of a couple of editions of Section D and may be able to help you out with the reference.